# Define your item pipelines here
#
# Don't forget to add your pipeline to the ITEM_PIPELINES setting
# See: https://docs.scrapy.org/en/latest/topics/item-pipeline.html


# useful for handling different item types with a single interface
from itemadapter import ItemAdapter

# 如果向使用管道 那么必须子啊setting开启管道
class Dangdang38Pipeline:
    # items就是yield后面的book对象
    def process_item(self, item, spider):
        with open('book.json', 'w', encoding='utf-8') as f:
            f.write(item)

        return item
